diff --git a/cmd/profile.go b/cmd/profile.go
index 465549e..a46e8b4 100644
--- a/cmd/profile.go
+++ b/cmd/profile.go
@@ -138,7 +138,13 @@ var AddProfileCmd = &cobra.Command{
 		if fileConfig.DefaultProfile == "" {
 			fileConfig.DefaultProfile = name
 		}
-		config.WriteConfigToFile(fileConfig)
+
+		err = config.WriteConfigToFile(fileConfig)
+		if err != nil {
+			fmt.Printf("add profile %s failed\n, err: %v\n", StyleBold.Render(name), err)
+			return err
+		}
+		fmt.Printf("Added profile %s\n", StyleBold.Render(name))
 
 		if outputFormat == "json" {
 			return outputResult(profile)
@@ -168,6 +174,7 @@ var RemoveProfileCmd = &cobra.Command{
 			if len(fileConfig.Profiles) == 0 {
 				fileConfig.DefaultProfile = ""
 			}
+
 			config.WriteConfigToFile(fileConfig)
 			if outputFormat == "json" {
 				return outputResult(fmt.Sprintf("Deleted profile %s", name))
diff --git a/main.go b/main.go
index 9430448..c7b9e49 100644
--- a/main.go
+++ b/main.go
@@ -18,6 +18,7 @@ package main
 
 import (
 	"errors"
+	"fmt"
 	"os"
 	"pb/cmd"
 	"pb/pkg/config"
@@ -140,18 +141,31 @@ func main() {
 			Profiles:       map[string]config.Profile{"demo": defaultInitialProfile()},
 			DefaultProfile: "demo",
 		}
-		config.WriteConfigToFile(&conf)
+		err = config.WriteConfigToFile(&conf)
+		if err != nil {
+			fmt.Printf("failed to write to file %v\n", err)
+			os.Exit(1)
+		}
 	} else {
-		// updates the demo profile for existing users
-		_, exists := previousConfig.Profiles["demo"]
+		// Only update the "demo" profile without overwriting other profiles
+		demoProfile, exists := previousConfig.Profiles["demo"]
 		if exists {
-			conf := config.Profile{
-				URL:      "http://demo.parseable.com",
-				Username: "admin",
-				Password: "admin",
-			}
-			previousConfig.Profiles["demo"] = conf
-			config.WriteConfigToFile(previousConfig)
+			// Update fields in the demo profile only
+			demoProfile.URL = "http://demo.parseable.com"
+			demoProfile.Username = "admin"
+			demoProfile.Password = "admin"
+			previousConfig.Profiles["demo"] = demoProfile
+		} else {
+			// Add the "demo" profile if it doesn't exist
+			previousConfig.Profiles["demo"] = defaultInitialProfile()
+			previousConfig.DefaultProfile = "demo" // Optional: set as default if needed
+		}
+
+		// Write the updated configuration back to file
+		err = config.WriteConfigToFile(previousConfig)
+		if err != nil {
+			fmt.Printf("failed to write to existing file %v\n", err)
+			os.Exit(1)
 		}
 	}
 
diff --git a/pkg/config/config.go b/pkg/config/config.go
index c867124..434113d 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -90,12 +90,18 @@ func WriteConfigToFile(config *Config) error {
 func ReadConfigFromFile() (config *Config, err error) {
 	filePath, err := Path()
 	if err != nil {
-		return
+		return &Config{}, err
 	}
+
 	data, err := os.ReadFile(filePath)
 	if err != nil {
-		return
+		return &Config{}, err
 	}
-	toml.Unmarshal(data, &config)
-	return
+
+	err = toml.Unmarshal(data, &config)
+	if err != nil {
+		return &Config{}, err
+	}
+
+	return config, nil
 }